Landing-chassis.



F. M. GREEN.

LANDlNG CHASSIS.

AP'PLICATION FILED SEPT. 28. 1918.

3 SHEETS-SHEET 1- Patented Mar. 25, 1919.

/N VE/VTOR FL. Green,

F. M. GREEN.

LANDlNG CHASSIS.

AP$LICAT10N FILED SEPT. 28. 191B.

Patented Mar. 25, 1919.

3 SHEETS-SHEET 2.

' nv vEA/mR FM. Green F. M. GREEN.

LANDING CHASSIS. APPLICATION FILED SEPT. 28. I918. y

Patented Mar. 20, 1919 3 SHEETSSHEET 3.

1 l I I 1 x l I 1 I I l I To all whom it may concern:

FREDERICK MICHAEL GREEN, OF IPARKSIDE,

covnn'rnx, ENGLAND, assrsnon 'ro SIDDELEY-DEASY MOTOR'CAE COMPANY LIMITED, 03 PARKSIDE, COVENTRY,

ENGLAND.

LANDHTG-CEASSIS.

Specification of Letters Patent. Patented Mar. 25, 1919.

Application filed September 28, 1 .918. Serial Np. 256,112.

Be it known that I, FREDERICK lVIIQHAEL GREEN, a subject of the King of Great Britain and Ireland, residing at Parkside, Coventry in the county of Warwick, England, have invented new and useful Improvements in Landing-Chassis, of which the following is a specification.

This lIIVBIItiOILIBlZilLGS to landing chassis of aeroplanes and the like, of the type in which the shock absorbing members are controlled partly by hydraulic means and partly by springs, and it consists of an improved shock-absorbing strut for connecting the axle carrying the landing wheels with the fuselage, which has for its object obtaining a maximum shock absorbing efiect with a minimum amount of relative movement between the parts of the strut.

A further object of the invention is to reduce the windage on this type of strut and to simplify its construction.

We attain these ends by the construction shown in the accompanying drawing in which Figures 1 and 2 are views in front and side elevation respectively-partly in sectiori-of a strut constructed according to the present invention.

Fig. 3 is a view in transverse section on lines o o Figs. 1 and 2.

Fig. 4 is a view in transverse section on lines to w Figs. 1 and 2, and 1 Figs. 5 and 6 are views in side and front elevation-partly in section on an enlarged scaleshowing more clearly the details of construction of the upper portion of the strut.

wheels.

- On the end of the inner tubular element a is a piston 10 adapted to slide in the outer tubular element 7). In said piston is a series leakage holes 1" and one or I of permanent more auxiliary leakage holes r the latter being controlled by a spring-loaded valve 8. On the upper end of the tubular element a is fixed a plate -c which carries the attachment by which the strut is attached to the fuselage of the machine. This plate is.at-' tached to the tubular element a so that its "plane lies at right angles to the axis of said Coupled with this plate by means 1 element. of a cover or fairingmwhich is so shaped as to give this part of the strut an elliptical or streamline shape in cross section-is another plate 0? which is free to slide in relation to the tubular elements a and b. On the plate (Z is mounted a second cover or fairing n which also has an elliptical or stream-line shape in cross section. This cover or fairing is adapted to cooperate with a similarly shaped housing 0 mounted on the lower end of the tubular member 6- whioh carries the attachment by which the strut is attached to the frame or axle carrying the landing wheelsso as to preserve the elliptical or stream-line shape of the strut in cross section throughout its entire length. On the sliding plate cl are mounted two brackets c and e between which and two brackets f and f mounted on the upper end of the outer tubular element 6 are arranged the controlling springs g which consist of lengths of rubber cordwhich are attached to the pins h and h carried by the two groups of brackets e and f. Extending between the plate a and the brackets 7 and 7" are one or more inextensible flexible couplings '70 for the purpose of limiting the relative movementv of the two elements a and b when the landing chassis is inoperative,.the lengths of said couplings being such as will keep the springs 9' under a certain amount of tension. I

When the aeroplane is flying the weight of the axle and wheels of is suflicient to make he tubular element 7) of the strut drop'with respect to the element 0. within the limits of the couplings k so as to extend the strut to its fully extended position. The oil in the tubular elements then the landing chassis ed on the icwer respect she temphmes cempttsitlg mug fed t0 telescope cue Wchmflic cushion o'eict members, it piste fit c inner tub-211m meme (1 to slide freely over the 1 memhez; :1- tuhutsr cover e1? failing fixed "e and ctmneetieg" said plates s seccnft tsh'tlmr cever 01. fairing carried by the plate is -Leptect t0 'sticte eves the Outer tubular me her, a hcusing mmmtend 01" the enter tubular member said hanging being adapted. tp ceepemte with the secend ester or hiring to preserve the ettipticel shapes-t the strut in cross section, bracket mounted on the upper enct 0t cuter tuhutsr metehet, :1 series at springs operating in tensicn hetween said, bracket met the plate emitted by erstin 7 the ilpper end. of the inner tubular memhelu and check cmlptingsoncmting between ssiit plate and, saint 3. A shcck ahsothine strut 01: t ing chassis o1: serwmmes cem'pt'is W" tubular members arm-s eat t0 tetesecpe one Within the othet; :1- hjrch'sutic cushion 0persting; between said members, Em el'tipticelty shaped piste fiXGCt an inner tubular member, a plate ectspted to slide freely ever the ester tuhshu? v Q a tubular cover 0:. is 0; st]? the upper end of the 0nd tussle v 5 Ancuntee en tubular metshet to slide te Within snict erschet maestouter meme: in tensiot't beme ptste carried by 11 1 tubular m mhez" between said.

s m at am l se twn earned by ectsgtect t0 Shit?) me;- the outer tubut a mem er, s heusing tich 11101 .1 vter tube et'iipt'ics]. shape the tower e whet said hensi u cepi thy it movement between in the direction te shorten the leng h cf strut, hyctrentic means "501" same end, met check couptings operating between sait bracket and said plate f0? controlling the emeunt of movement between the We teht hr members of the strut in the ctirectien to tncteese its length.

111 e sheet: sbserhingg' strut for the teeth in chassis of templates the cembinstien c twe tubular members a and P5 arranged to tetesccpe one Within the ether, e11 elttp ticath; shaped plate a fixed on the uppet' 0f the inner" tuhutsr member a an ettipticatty shaped plate (5 acteptect to sticte freely ever the outer tubular member F), at tubules cot e11 e3? fairing m of efltpticst shape in cress section fitteit to and connecting said plates 0 and d5 8L hctteing 0f elliptical shape in cross section mnunted en the tower enct the tubular member 6, s seccnct tuhuter cover or fairing n of ehtpticet 'shspe (31"003663Cti0fl cm'ee by the plate "65 and ads ted to shale ei y oveethe hG'USil e hl'eeket 7 mounted in upper elm ating between said bracket f and the plate 1 through said piston and of e spring-load-w 0 carried by the inner tubular member a, ed valve 8 controlling said auxiliary leakage check conplings is operating between the holes, 1%

plate (1 and the bracket f, a piston 11 formed In testimony I have signed my name to 5 on 01' carried by the lower end of the inner this specification.

tubular member a permanent leakage holes j 1* through said piston, auxiliary leakage holes FREDERICK MICHAEL GREEN. 

